linux-kernel - Re: [RT] oops in 4.1.3-rt3

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Message-ID: <alpine.DEB.2.11.1508041403550.3983@nanos>
Date:	Tue, 4 Aug 2015 14:05:10 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Nicholas Mc Guire <der.herr@...r.at>
cc:	Clark Williams <williams@...hat.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	RT <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RT] oops in 4.1.3-rt3

On Tue, 4 Aug 2015, Nicholas Mc Guire wrote:
> <snip>
>     3 root      -2   0       0      0      0 R  60.3  0.0   5756:16 ksoftirqd/0 
>    23 root      -2   0       0      0      0 R  50.8  0.0   4948:08 ksoftirqd/2
>    17 root      -2   0       0      0      0 S  50.6  0.0   4897:13 ksoftirqd/1
>    29 root      -2   0       0      0      0 S  50.4  0.0   4953:24 ksoftirqd/3

So ksoftirqd eats 50+% CPU on each core. On an idle system!?! Any
chance that you can get a function trace snapshot out of it?

Thanks,

	tglx
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